2
Operating instructions
Pull-wire emergency-stop switches
EX-T3Z 068
EN
1.6 Warning about misuse
In case of inadequate or improper use or manipulations of the
safety switchgear, personal hazards or damages to machin-
ery or plant components cannot be excluded. The relevant re-
quirements of the standard EN ISO 13850 must be observed.
1.7 Exclusion of liability
We shall accept no liability for damages and malfunctions resulting from
defective mounting or failure to comply with this operating instructions
manual. The manufacturer shall accept no liability for damages result-
ing from the use of unauthorised spare parts or accessories.
For safety reasons, invasive work on the device as well as arbitrary re-
pairs, conversions and modifications to the device are strictly forbidden;
the manufacturer shall accept no liability for damages resulting from
such invasive work, arbitrary repairs, conversions and/or modifications
to the device.
2. Product description
2.1 Ordering code
This operating instructions manual applies to the following types:
EX-T3Z 068-
➀
YR
No. Option
Description
➀
11
1 NO contact / 1 NC contact
22
2 NO contact / 2 NC contact
33
3 NO contact / 3 NC contact
Only if the information described in this operating instruc-
tions manual are realised correctly, the safety function and
therefore the compliance with the Machinery Directive and
the Explosion Protection Directive is maintained.
2.2 Special versions
For special versions, which are not listed in the order code below 2.1,
these specifications apply accordingly, provided that they correspond to
the standard version.
2.3 Destination and use
Pull-wire emergency stop switches are used wherever it must be pos-
sible to initiate the emergency stop command from any point on a ma-
chine, equipment or plant. The emergency stop command is triggered
by pulling on the tensioned pull-wire. The components can be used in
explosion-endangered areas of Zone 21 and 22 equipment category 2D
and 3D. The installation and maintenance requirements to the standard
series EN 60079 (ABNT NBR IEC 60079) must be met.
The pull-wire Emergency Stop switch has wire-breakage monitoring. On
pulling or breakage of the wire, the NC contacts are positively opened
and the NO contacts are closed. The pull-wire Emergency Stop switch
can then only be returned to the operational condition by a resetting
operation.
2.4 Technical data
Equipment category:
L
II 2D
Ex protection:
Ex tb IIIC T90°C Db
INMETRO:
DNV 13.0077
Standards:
EN 60947-5-1, EN 60947-5-5,
EN ISO 13850, EN 60079-0, EN 60079-31,
ABNT NBR IEC 60947-5-1, ABNT NBR IEC 60947-5-5,
ABNT NBR IEC 60079-0, ABNT NBR IEC 60079-31
Enclosure:
Grey cast iron, painted
Cover:
cast iron, enamel finish
Protection class:
IP 65, IP 66 to
EN 60529 (ABNT NBR IEC 60529)
Contact material:
silver, gold-flashed
Contact type:
change-over contact with double break,
max. 3 NO and 3 NC contacts
Switching system:
A
EN 60947-5-1 snap action,
NC contacts with positive break
Max. impact energy:
7 J
Max. actuating speed:
1 ms
Max. surface temperature:
+90 °C
Termination:
Screw terminals
Cable section:
max. 1.5 mm², min. 0.75mm²,
solid and stranded wire with conductor ferrules
Cable entry:
2 × M20 × 1,5
U
imp
:
4 kV
U
i
:
250 V
I
the
:
10 A
Utilisation category:
AC-15 / DC-13
I
e
/U
e
:
2.5 A / 230 VAC;
6 A / 24 VDC
Max. fuse rating:
6 A gG D-fuse
Required short-circuit current:
1000 A
Positive break torque:
1,8 Nm
Angle for positive break travel:
32°
Positive break force:
50 N
Actuating force:
max. 50 N (30 N in wire direction)
Ambient temperature:
–20 °C ... +60 °C
Mechanical life:
50.000 operations
Max. wire length:
2 × 50 m
Features:
wire pull and breakage detection
Cable glands:
L
II 2GD,
1,21 ABNT NBR IEC 60079
Cable cross-section:
min. Ø 7 mm; max. Ø 12 mm
Tightening force:
Cable gland: 8 Nm
Blocking screws: 8 Nm
Cover screws: 1 Nm
2.5 Safety classification
Standards:
EN ISO 13849-1
B
10d
Opener (NC):
100.000
Service life:
20 years
MTTF
B
d
x
x
h
s/h
3600
d
10d
op
op
op
n
0,1 x n
op
t
cycle
(Specifications can vary depending on the application-specific
parameters h
op
, d
op
and t
cycle
as well as the load.)
3. Mounting
3.1 General mounting instructions
Fitting is only authorised in a de-energised condition
The fitting may only be carried out by authorised personnel. The pull-
wire emergency stop switch must be fitted in the middle of the plant.
Four mounting holes are available. The use of a protective ground wire
is imperative. Mount the pull-wire emergency stop switch so that the de-
vice can be unlocked and reset by hand after an emergency stop com-
mand. The pull wire must be installed according to the specifications
(Fig. 1).
